Move printing defines to buildflag system.

build/config/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/allocator.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/crypto.gni")
 import("//build/config/dcheck_always_on.gni")
 import("//build/config/features.gni")
@@ skipping 56 matching lines @@
   }
   if (enable_notifications) {
     defines += [ "ENABLE_NOTIFICATIONS" ]
   }
   if (enable_plugins) {
     defines += [ "ENABLE_PLUGINS=1" ]
   }
   if (enable_pdf) {
     defines += [ "ENABLE_PDF=1" ]
   }
-  if (enable_basic_printing || enable_print_preview) {
-    # Convenience define for ENABLE_BASIC_PRINTING || ENABLE_PRINT_PREVIEW.
-    defines += [ "ENABLE_PRINTING=1" ]
-    if (enable_basic_printing) {
-      # Enable basic printing support and UI.
-      defines += [ "ENABLE_BASIC_PRINTING=1" ]
-    }
-    if (enable_print_preview) {
-      # Enable printing with print preview.
-      # Can be defined without ENABLE_BASIC_PRINTING.
-      defines += [ "ENABLE_PRINT_PREVIEW=1" ]
-    }
-    if ((enable_basic_printing && is_win) || enable_print_preview) {
-      # Windows basic printing or print preview requires pdf enabled.
-      assert(enable_pdf,
-             "Windows basic printing or print preview needs pdf: " +
-                 "set enable_pdf=true.")
-    }
-  }
   if (enable_spellcheck) {
     defines += [ "ENABLE_SPELLCHECK=1" ]
   }
   if (use_browser_spellchecker) {
     defines += [ "USE_BROWSER_SPELLCHECKER=1" ]
   }
   if (dcheck_always_on) {
     defines += [ "DCHECK_ALWAYS_ON=1" ]
   }
   if (use_udev) {
@@ skipping 358 matching lines @@
       # file doesn't exist, no error will be generated (probably MS tested this
       # case but forgot the other one?). To reproduce this error, do a build,
       # then delete the precompile.c.obj file, then build again.
       cflags_c = [ "/wd4206" ]
     } else if (is_mac) {
       precompiled_header = "build/precompile.h"
       precompiled_source = "//build/precompile.h"
     }
   }
 }